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The hsp150Δ‐carrier confers secretion competence to the rat nerve growth factor receptor ectodomain in Saccharomyces cerevisiae
Author(s) -
Simonen Marjo,
Vihinen Helena,
Jämsä Eija,
Arumäe Urmas,
Kalkkinen Nisse,
Makarow Marja
Publication year - 1996
Publication title -
yeast
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.923
H-Index - 102
eISSN - 1097-0061
pISSN - 0749-503X
DOI - 10.1002/(sici)1097-0061(199604)12:5<457::aid-yea930>3.0.co;2-d
Subject(s) - ectodomain , biology , saccharomyces cerevisiae , nerve growth factor , endoplasmic reticulum , secretion , signal peptide , extracellular , glycoprotein , receptor , secretory protein , biochemistry , microbiology and biotechnology , yeast , peptide sequence , gene
When the extracellular domain of rat low‐affinity nerve growth factor receptor (NGFR e ) was synthesized in Saccharomyces cerevisiae with the signal peptide of invertase, NGFR e was translocated to the endoplasmic reticulum (ER) and retained there. However, when NGFR e was fused to the C‐terminus of the hsp150Δ‐carrier, the hsp150Δ–NGFR e fusion protein was efficiently secreted to the growth medium with no apparent retention in the ER. The NGFR e portion was disulphide‐bonded and its single N‐glycosylation site was occupied. The hsp150Δ‐carrier is an N‐terminal signal peptide‐containing fragment of a yeast secretory glycoprotein. Hsp150Δ–NGFR e , harvested from the culture medium, inhibited the cross‐linking of [ 125 I]NGF to authentic NGFR on the surface of human melanoma cells. Moreover, [ 125 I]NGF could be chemically cross‐linked to secretory hsp150Δ–NGFR e , suggesting that the NGFR e portion had adopted a ligand‐binding conformation. However, inhibition of the cross‐linking by unlabelled NGF was less effective than in the case of the authentic receptor. The hsp150Δ‐carrier may have potential in the production of mammalian proteins, which require elaborate folding and disulphide formation in the ER.